COZ

koz (kots, "thorn"): A man of Judah (1 Chronicles 4:8). the American Standard Revised Version has added the article, making the name Hakkoz without sufficient reason. The name occurs with the article (Ha-qots) in Ezra 2:61; Nehemiah 3:4,21; 7:63, and 1 Chronicles 24:10, but not with reference to the same person. Coz was of the tribe of Judah, while Hakkoz belonged to the family of Aaron.

From the International Standard Bible Encyclopedia
Edited by James Orr, published in 1939 by Wm. B. Eerdmans Publishing Co.